Radio receiving set



y 1935. J. A. VILA Y COLOMBO 2,003,250

RADIO RECEIVING SET Filed Aug. 8, 1952 41,1. 'IIIIIIIIIII J Mambo[NVLENTOR Patented May 28, 1935 UNITED STATES PATENT OFFICE ApplicationAugust 8,

1932, Serial No. 627,979

In Cuba August 1, 1932 3 Claims.

This invention refers to radio receiving sets and has for its mainobject to provide certain improvements in the structure of devices ofthis kind, by which objectionable interference in radio 5 reception isreduced and the quality and distinctness of the sound improved.

In the drawing:

Figure 1 is a side elevation in detail of an arrangement including myinvention.

Figure 2 is an end elevation in detail of same.

Figure 3 is a horizontal sectional view, in detail, according to line 33of Figure 1.

Figure 4 is a cross vertical sectional view in detail, according to linel4 of Figure l; and

Figure 5 is a perspective view of the arrangement.

By I is designated a metallic closed casing within which are secureduprights 2 provided on their inner faces with insulating plates 3. Acoil 4 is 20 wound on a copper core, which is supported in the plates 3,the terminals and iof the coil passing through the bores 8 and 9 in thecasing l, and being connected to the binding post id in the antenna lineof a radio receiving set.

Below the coil 4 there is arranged another coil the core of which ismade of iron or steel, and is secured in the insulating plates 3. Theterminals l0 and H of the second coil pass through bores I6 and I1 andare connected to a binding 30 post [5 of the ground line of a radioreceiving set.

The wire connecting the antenna to the lightning arrester must be ofvery small gauge, as well as those from the switch to the receiving setand also the wire to ground. The connection wire from the lightningarrester to the switch must be of larger gauge.

I claim:- 7

1. In a radio receiving set, two closely arranged coils, coressupporting said coils and insulated from each other, one of said coresbeing formed 10 of magnetizable material and the other being formed ofcopper, the coils being connected, respectively, with the antenna andground leads.

2. In a radio receiving set, two closely arranged coils, coressupporting said coils and insulated 15 from each other, one of saidcores being formed of magnetizable material and the other being formedof copper, the coils being connected, respectively, with the antenna andground leads, a casing enclosing the coils and cores, and insulat- 20ing means supporting the cores in'said casing.

3. In a radio receiving set, two closely arranged coils, coressupporting said coils and insulated from each other, one of said coresbeing formed of magnetizable material and the other being formed ofcopper, a casing enclosing the cores and coils, one of the coils beingconnected to the ground wire of the radio set and the other coil beingconnected with the antenna wire of the set.

JUAN ANTONIO VILA Y COLOMBO.

